The ProtoLab Marathon Race Briefs are a minimalist full-coverage racing brief designed specifically for marathon runners. They feature a laser-cut three-panel construction using lightweight French woven fabric. Instead of a waistband, they use silicone grippers for fit. The briefs have two rear pockets that can hold up to 6 energy gels. This design aims to provide a close fit and low weight while offering storage capacity for long-distance races. The absence of a traditional waistband and the use of silicone grippers are intended to minimize potential discomfort during extended wear.