ALPACA SHOE/BOOTS INSOLE Made in the USA NATURAL INSULATION - Put an extra layer of comfort and insulation between your feet and the cold, damp ground with naturally odor resistant and hypoallergenic alpaca insoles. These removable alpaca boot inserts are 3/8” thick & can be trimmed to smaller size. Each pair molds to your feet over time, creating the perfect fit. ALPACA is Naturally Warmer & Stronger than wool! Lanolin Free & Hypoallergenic Breathable & Odor Resistant. An All Natural, Renewable Fiber Two sizes to choose from. LARGE - MENS Shoe Size 10-13 X-LARGE - MENS Shoe Size 13-15 A pair of 2.