1、Made from environmentally friendly elastic latex,durable and stretch further. 2、5 exercise resistance band strengths-0.35mm (5-10lbs),0.5mm (10-15lbs),0.7mm (15-20lbs),0.9mm(20-30lbs) and 1.1mm (30-40lbs). 3、You can combine the resistance bands together to give different resistance levels for your workouts. 4、Suitable for yoga,Pilates,working out,stretching and work out etc. Features: Made from environmentally friendly elastic latex,durable and stretch further. 5 exercise resistance band strengths-0.35mm (5-10lbs), 0.5mm (10-15lbs), 0.7mm (15-20lbs), 0.9mm(20-30lbs) and 1.1mm (30-40lbs). You can combine the resistance bands together to give different resistance levels for your workouts. Suitable for yoga,Pilates,working out,stretching and work out etc. Specification: Model: Set 1/ Set 2/Set 3/Set 4/Set 5 (optional) Material: latex Size: 600*50*0.35mm / 600*50*0.5mm / 600*50*0.7mm / 600*50*0.9mm / 600*50*1.1mm Package size: 18*11*2cm/7.1*4.3*0.8in Package weight: Approx. 120g/4.2oz Package List: 5* Resistance Bands 1* Carry Bag 1* Instruction NOTE: Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding. 5* Resistance Bands 1* Carry Bag 1* Instruction NOTE: Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding.