Check Out Manzella Bow Hunting Gloves. Cow-Grain Leather Palm - Provides excellent grip in all weather conditions. Exclusive Bow Release Collar™ - Allows bow release to be worn next to skin, without compromising protection from the elements. Hidden heat pack pocket - Allows for added warmth when needed. Thinsulate™ Insulation - 40 gm of insulation provides lightweight, reliable warmth.