Material:
Waterproof nylon fabric, PP cotton

S
Neck circumference:13-22CM(5.1-8.7inch)
Recommended weight:0-3KG(0-6.6lb)
M
Neck Circumference:17-27CM(6.7-10.6inch)
Recommended Weight:3-6KG(6.6-13.3lb)
L
Neck Circumference:20-32CM(7.8-12.6inch)
Recommended Weight:5-9KG(11.0-19.8lb)

Weight:
S 71g M 116g L 130g (S 2.5oz M 4.1oz L 4.6oz )