KORKERS 2.5MM I-DRAIN WADING SOCK - Comfy, form-fitting, 2.5mm, flats/warm water neoprene socks with a perforated Airprene footbed to drain away stagnant toe juice. Great when wading in sandals or wading shoes. SIZES S(7-8), M(9-10), L(11-12), XL(13-14)