ScaleTech: technology blending modern materials w/ancient concepts. All snake-proof gaiters using inserts have an inherent flaw; when inserts are laid side-by-side, a small gap is created between panels & this area is NOT snake-proof. With ScaleTech, layers are overlapped, eliminating the gap. Water repellent fabric. Briar & brush protection. Two Ladder Lock Adjustment straps for secure, comfortable fit. One Size Fits Most (up to 21" calf). 16" snake-proof coverage from knee to ankle.