Blue Seventy Adjustable Thermal Skull Cap size-one-size while 360-degree reflective details increase

while 360-degree reflective details increase visibility in low-light conditions

Elastic fabrics

Designed to keep you comfortable whether you're running or relaxing

40% Polyester

Blue Seventy Adjustable Thermal Skull Cap size-one-size while 360-degree reflective details increaseThermal swim caps are a game changer when you want to start your open water swimming early or extend it into fall. FR staff member Stefan will start the open water season in the ocean wearing thermal cap, gloves and booties. The gloves will be the first to come off, then the booties and then the cap as it affects the swim stroke the least and has the greatest effect combating heat loss.