Choose a sock model, then use its size chart. This guide includes 1 REI Co-op model, with their material, cushion and layer differences kept separate.
REI Co-op Mountain Merino Wool Lightweight Crew, C10726
This REI construction lists a 72% merino blend and light padding at the heel, toe and bottom.
crewlight cushionStandard sock
Keep in mind: The padding sits at the heel, toe and bottom of the foot. Compare full cushioning if you want padding around the whole foot.
The lookup includes Mountain Merino C10726 chart. Match the chart to the exact model, then check the heel and toe fit in your footwear.
Mountain Merino C10726: Numeric ranges for this model are not available in this lookup. Open the product page’s Size chart, or choose another model with a published range here; a medium from another brand cannot settle the REI size.
Open the brand size lookup. See the fit checklist for heel position, toe room and cuff clearance.
Mountain Merino C10726 allows cold or warm machine washing and low tumble drying. Do not bleach or use fabric softener.
A different instruction on the exact sock takes precedence over general brand guidance. Use the care lookup and your own drying estimate in the rotation planner.
This guide does not establish a brand replacement promise. Base a purchase on the seller’s current terms.
REI offers store and mail return routes. Bring the receipt or order-confirmation barcode for a store return. An exchange is a return followed by a new purchase. Eligibility depends on the order; no numeric return window is supplied by this lookup.
