According to USA Ultimate Rules (11th edition): "Players may wear any soft clothing that does not endanger the safety of other players or provide unfair advantage."
Back in July 2016, Matt Rehder (Sockeye) was seen wearing what
|screengrab via USAU 2016 US Open Men's Final|
Could there be an unfair advantage by wearing more engineered products (e.g. Freezer Zero neck gaiter/bandana) which claims to: "which reacts with sweat to lower the temperature of the material" or other similar "ice bandana" products?
This question of active-wear that could potentially give an unfair advantage was originally raised back in 2012. This goes beyond the wicking ability of ultimate jerseys and shorts. Accessories are being designed based on activity and with a direct purpose of helping the wearer regulate temperature. Use on the sidelines is totally acceptable, but wearing for example a cooling neck scarf while playing could be seen as advantageous.
1. Where do you draw the line in the temperature-regulating performance wear? Undergarments and/or outerwear?
2. Who enforces whether an unfair advantage is being gained from what a player is wearing? Observers and/or players?