with a lightweight spring that doesn't cost the earth

while the collar design is compatible with a neck brace

Specialized SX Trail 2011 - Use a Standard 216x63mm (8

There's also a strip of silicone inside to help keep them from sliding down

Leatt MTB Gravity 5.0 Jersey - M - Spruce Green PLP|Colour with a lightweight spring thatThe Gravity 5. 0 Jersey is built for hot weather rides, delivering maximum ventilation, technical comfort, and race ready performance. Its slim 3D anatomic fit uses just two panels of fabric: breathable elastic mesh on the body and semi compressive stretch knit on the sleeves for optimal ventilation and durability. Over 200 laser cut vents, anti odour treatment, and cooling technology help keep your body temperature in check when the trail gets rowdy.