Drake Waterfowl Systems Mid Season Technology (MST) Eqwader Mock Turtleneck Shirt features Refuge HS with HyperShield Technology. Refuge HS (Hard Shell) is another innovative material brought to you by Drake. Combining the toughest and strongest fibers available enables this material to stand up against all of the elements a hunter faces with very little maintenance. 100% waterproof, windproof and breathable, HyperShield is an impenetrable membrane that will shield you from the elements. Also features Fleece-lined warm mock turtleneck with adjustable cuffs and taped seams. Available in Realtree Max 4 camo with brown bottom. Sizes M-2XL.