Our Thoughts: The absolute best protection possible for a slip on shin-guard available on the market currently. A very strong shell with incredible protection for high level players. The only thing to note is that the protection is so good because the shell is quite rigid. This means it doesn't have much give so these will not be a comfortable shin-guard for someone with a broader calf. We suggest someone with a broader calf consider the BOP International shin guards. TK Product Description: TK2 SHIN GUARDS Safety is our top priority. That's why we designed our TK2 shin guards to guarantee excellent protection with an extremely hard outer shell and a comfortable foam back (CE certified protective article for field hockey). Features: ultra high-performance load spreading PPC shield raised central back for increased breathability and protection air vents to keep you cool comfortable foam interior elastic strap (removable) for a personalised fit Sizes: S, M, L, XL