Compatible Models: This TPU ring cover is compatible with Oura Ring Gen 4 and Gen 3 Horizon/Heritage (Not for Oura Ring 4 Ceramic). Each cover is precisely made for one specific Oura Ring size for a secure fit

Precise Fit for Oura Ring 5: Designed exclusively for Oura Ring Gen 5, this clear skin cover fits snugly without shifting or lifting. Choose the same size as your ring, as each skin fits one specific size only. NOTE: Not compatible with brushed Oura Ring finishes

Compatibility: Specifically designed for Omron tens units models, including PM400, PM500, PM3030, PM3029, PM3031, PM3032, HV_F128, and more

DUAL-SIPPING DESIGN: Features an innovative spout that allows both sipping through a straw or tilting back to drink directly from the wide-mouth opening

2-in-1 Lid, Sip or Swig: Features a flip straw for easy sipping and a push-button spout for quick swigging; stay hydrated your way — at the gym, on the go, and beyond

Double Wall Insulation: Stainless steel design inside the water bottle, vacuum insulation stops heat from escaping and keeps the temperature just right for hours.