<!--ProdInc[170057279]/Mall:[rei_US]--> The polyester yarn in REI Co-op COOLMAX EcoMade liner socks is made from recycled water bottles Nylon adds durability, while spandex offers stretch and shape retention so the fit will remain snug, wash after wash Smooth, flat toe seams ensure no bunching or irritation for your toes Machine wash inside out in cold or warm water; no bleach or fabric softener; tumble dry low REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits Made in USA with imported and domestic yarnsMade in USA. Technical specs <table border=1 cellpadding=5 style=''border-collapse: collapse;''><!--[--><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Best Use</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Hiking</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Fabric</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>50% COOLMAX EcoMade polyester/49% nylon/1% spandex</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Sock Height</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Crew</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Sock Cushioning</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tec <a href=''https://www.rei.com/product/165110/rei-co-op-coolmax-ecomade-liner-crew-socks'' target=_blank><img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=rei&ProdInc=170057279&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px'' border=0></a>
<!--ProdInc[170057279]/Mall:[rei_US]--> The polyester yarn in REI Co-op COOLMAX EcoMade liner socks is made from recycled water bottles Nylon adds durability, while spandex offers stretch and shape retention so the fit will remain snug, wash after wash Smooth, flat toe seams ensure no bunching or irritation for your toes Machine wash inside out in cold or warm water; no bleach or fabric softener; tumble dry low REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits Made in USA with imported and domestic yarnsMade in USA. Technical specs <table border=1 cellpadding=5 style=''border-collapse: collapse;''><!--[--><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Best Use</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Hiking</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Fabric</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>50% COOLMAX EcoMade polyester/49% nylon/1% spandex</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Sock Height</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Crew</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Sock Cushioning</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tec <a href=''https://www.rei.com/product/165110/rei-co-op-coolmax-ecomade-liner-crew-socks'' target=_blank><img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=rei&ProdInc=170057279&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px'' border=0></a>