{"product_id":"merino-250-half-zip-base-layer-top-mens","title":"REI Co-op Merino 250 Half-Zip Base Layer Top - Men's","description":"\u003cp style=\"margin:1em 0\"\u003eThis heavyweight merino wool base layer top is made with 100% merino wool for a supersoft feel without the scratchiness. It naturally wicks away sweat, resists odors and dries quickly, with a half-zip collar for ventilation and thumbhole cuffs that hold sleeves in place.\u003c\/p\u003e\u003cp style=\"margin:1em 0\"\u003eDesigned for a close-to-body fit with underarm gussets for ease of movement and forward-rolled shoulder seams to help prevent chafing under pack straps. Machine wash cold with wool wash product, do not bleach, and tumble dry low.\u003c\/p\u003e\n\u003ch3 style=\"margin:1.25em 0 0.5em\"\u003eKey Features\u003c\/h3\u003e\n\u003ctable class=\"pu-table\" style=\"width:100%;border-collapse:separate;border-spacing:0;border:0;box-shadow:none;outline:none;background:none;table-layout:fixed;margin:0 0 1em\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eBest Use\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eMultisport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eShirt Type\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003ePartial-zip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eFabric\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003e100% merino wool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eSun-Protective Fabric\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eUPF Rating\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003e50+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eMoisture Wicking\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eQuick Drying\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eUnderwear Weight\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eHeavyweight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eSleeve Length\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eLong Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eThumbholes\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eGender\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top;border-bottom:1px solid rgba(128,128,128,0.16);border-bottom:1px solid color-mix(in srgb,currentColor 12%,transparent)\"\u003eMen's\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:0;padding:0.4em 0.75em 0.4em 0;opacity:0.65;vertical-align:top\"\u003eSustainability\u003c\/td\u003e\n\u003ctd style=\"border:0;padding:0.4em 0;vertical-align:top\"\u003eFair Trade Certified™ Factory - From a Climate Label Certified brand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"margin:0\"\u003e\u003cimg src=\"https:\/\/public.cloud-dam.rei.com\/api\/public\/content\/f9f2a982d54d4991b67be83d8dfbb709\" alt=\"\" loading=\"lazy\" style=\"max-width:100%;height:auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0\"\u003e\u003cimg src=\"https:\/\/www.rei.com\/dam\/c01_0809_how_to_choose_underwear_baselayers_lg.jpg\" alt=\"\" loading=\"lazy\" style=\"max-width:100%;height:auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0\"\u003e\u003cimg src=\"https:\/\/www.rei.com\/dam\/23232261_vagnini_20250625_0656_web_med.jpeg\" alt=\"\" loading=\"lazy\" style=\"max-width:100%;height:auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0\"\u003e\u003cimg src=\"https:\/\/www.rei.com\/dam\/content_09122016_0011_layering_up_web_med.jpeg\" alt=\"\" loading=\"lazy\" style=\"max-width:100%;height:auto\"\u003e\u003c\/p\u003e\n\u003ch3 style=\"margin:1.25em 0 0.5em\"\u003eHighlights\u003c\/h3\u003e\n\u003cul style=\"margin:1em 0\"\u003e\n\u003cli\u003eHeavyweight 250 g\/m² merino wool offers a soft feel without the scratchiness\u003c\/li\u003e\n\u003cli\u003eMade with 100% merino wool that naturally wicks away sweat, resists odors and dries quickly\u003c\/li\u003e\n\u003cli\u003eUPF 50+ sun protection\u003c\/li\u003e\n\u003cli\u003eCollar with half-zip neck lets you ventilate as needed\u003c\/li\u003e\n\u003cli\u003eThumbhole cuffs hold sleeves in place and help seal warmth in\u003c\/li\u003e\n\u003cli\u003eUnderarm gussets are made for ease of movement\u003c\/li\u003e\n\u003cli\u003eShoulder seams are rolled forward to help prevent chafing under pack straps\u003c\/li\u003e\n\u003cli\u003eClose-to-body fit for optimum performance\u003c\/li\u003e\n\u003cli\u003eBack length: 28.5 in.; Tall sizes: 30.5 in.\u003c\/li\u003e\n\u003cli\u003eWeight for size M: 10.9 oz. (310 g)\u003c\/li\u003e\n\u003cli\u003eLocker loop makes it easy to hang this shirt to dry or just keep it off the ground\u003c\/li\u003e\n\u003cli\u003eMachine wash cold, use wool wash product, do not twist or wring, remove promptly; do not bleach; tumble dry low\u003c\/li\u003e\n\u003cli\u003eMade in a Fair Trade Certified™ factory\u003c\/li\u003e\n\u003cli\u003eREI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:1.25em 0 0.5em\"\u003eHow to use\u003c\/h3\u003e\n\u003cp style=\"margin:1em 0\"\u003e\u003cstrong\u003eWhich material is best?\u003c\/strong\u003e\u003c\/p\u003e\u003cul style=\"margin:1em 0\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eWool:\u003c\/strong\u003e highly moisture-wicking and odor-resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynthetic:\u003c\/strong\u003e durable and less expensive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilk:\u003c\/strong\u003e soft and lightweight for casual activities\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin:1em 0\"\u003e\u003cstrong\u003eMatch the temp to the trek\u003c\/strong\u003e\u003c\/p\u003e\u003cul style=\"margin:1em 0\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight layers:\u003c\/strong\u003e best for moderate to cool temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMidweight layers\u003c\/strong\u003e: best for cold temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavyweight layers:\u003c\/strong\u003e best for below-freezing temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"margin:1em 0\"\u003e\u003cstrong\u003eFind your fit\u003c\/strong\u003e\u003c\/p\u003e\u003cul style=\"margin:1em 0\"\u003e\n\u003cli\u003eMust be close to skin to efficiently wick sweat; should fit comfortably snug\u003c\/li\u003e\n\u003cli\u003eBase layer is for moisture control; your mid layer is for warmth\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:1em 0\"\u003eFrom feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.\u003c\/p\u003e\n\u003ch4 style=\"font-size:1.05em;font-weight:600;margin:0.9em 0 0.2em\"\u003eNo questions have been asked about this product.\u003c\/h4\u003e\u003cp style=\"margin:0 0 0.6em\"\u003eBe the first to ask a question about this product\u003c\/p\u003e","brand":"REI Co-op","offers":[{"title":"Black \/ S","offer_id":67860868268259,"sku":"C100400001","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":67860868301027,"sku":"C100400002","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":67860868333795,"sku":"C100400003","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":67860868366563,"sku":"C100400004","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ XXL","offer_id":67860868399331,"sku":"C100400005","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ XXXL","offer_id":67860868432099,"sku":"C100400006","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ M Tall","offer_id":67860868464867,"sku":"C100400007","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ L Tall","offer_id":67860868497635,"sku":"C100400008","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL Tall","offer_id":67860868530403,"sku":"C100400009","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Black \/ XXL Tall","offer_id":67860868563171,"sku":"C100400010","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Hemlock Green \/ S","offer_id":67860868595939,"sku":"C100400011","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Hemlock Green \/ M","offer_id":67860868628707,"sku":"C100400012","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Hemlock Green \/ L","offer_id":67860868661475,"sku":"C100400013","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Hemlock Green \/ XL","offer_id":67860868694243,"sku":"C100400014","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Hemlock Green \/ XXL","offer_id":67860868727011,"sku":"C100400015","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Hemlock Green \/ XXXL","offer_id":67860868759779,"sku":"C100400016","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Mineral Water \/ S","offer_id":67860868792547,"sku":"C100400017","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Mineral Water \/ M","offer_id":67860868825315,"sku":"C100400018","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Mineral Water \/ L","offer_id":67860868858083,"sku":"C100400019","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Mineral Water \/ XL","offer_id":67860868890851,"sku":"C100400020","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Mineral Water \/ XXL","offer_id":67860868923619,"sku":"C100400021","price":86.86,"currency_code":"USD","in_stock":true},{"title":"Mineral Water \/ XXXL","offer_id":67860868956387,"sku":"C100400022","price":86.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/0971\/1331\/files\/30ea529074e65ab4ffd1b5b9477d1aa01bb5fb43.jpg?v=1793513845","url":"https:\/\/www.bestdeal999.com\/products\/merino-250-half-zip-base-layer-top-mens","provider":"Best Deal 999","version":"1.0","type":"link"}