Designed to help you stay wild, our Hydratrek Sandal CT features a tree frog-inspired tread that’s geared for grip. Maximizing surface area while dispersing water underfoot, this closed-toe spinoff is built for high-adrenaline water activities with a quick-dry upper, speed lace closure, and sticky Spider Rubber® outsole.
| 
 US 
M 
F 
inches 
 | 
 UK 
 | 
 Europe 
 | 
|---|---|---|
| 
 3 
8.4 
 | 
2 | 34 | 
| 
 3.5 
8.6 
 | 
2.5 | 34.5 | 
| 
 4 
8.8 
 | 
3 | 35 | 
| 
 4.5 
9 
 | 
3.5 | 36 | 
| 
 5 
9.2 
 | 
4 | 36.5 | 
| 
 5.5 
9.4 
 | 
4.5 | 37.5 | 
| 
 6 
9.6 
 | 
5 | 38 | 
| 
 6.5 
9.8 
 | 
5.5 | 38.5 | 
| 
 7 
10 
 | 
6 | 39.5 | 
| 
 7.5 
10.2 
 | 
6.5 | 40 | 
| 
 8 
10.4 
 | 
7 | 40.5 | 
| 
 8.5 
10.6 
 | 
7.5 | 41.5 | 
| 
 9 
10.8 
 | 
8 | 42 | 
| 
 9.5 
11 
 | 
8.5 | 42.5 | 
| 
 10 
11.2 
 | 
9 | 43 | 
| 
 10.5 
11.4 
 | 
9.5 | 44 | 
| 
 11 
11.6 
 | 
10 | 44.5 | 
| 
 11.5 
11.8 
 | 
10.5 | 45 | 
| 
 12 
12 
 | 
11 | 45.5 | 
| 
 12.5 
12.2 
 | 
11.5 | 46.5 | 
| 
 13 
12.4 
 | 
12 | 47 | 
| 
 13.5 
12.6 
 | 
12.5 | 47.5 | 
| 
 14 
12.8 
 | 
13 | 48.5 | 
| 
 14.5 
13 
 | 
13.5 | 49 | 
| 
 15 
13.2 
 | 
14 | 49.5 | 
| 
 16 
13.4 
 | 
15 | 50.5 | 
| 
 17 
13.6 
 | 
16 | 51 | 
| 
 18 
13.8 
 | 
17 | 52 | 
| 
 5 
8.8 
 | 
3 | 36 | 
| 
 5.5 
9 
 | 
3.5 | 36.5 | 
| 
 6 
9.2 
 | 
4 | 37 | 
| 
 6.5 
9.4 
 | 
4.5 | 37.5 | 
| 
 7 
9.6 
 | 
5 | 38 | 
| 
 7.5 
9.8 
 | 
5.5 | 38.5 | 
| 
 8 
10 
 | 
6 | 39 | 
| 
 8.5 
10.2 
 | 
6.5 | 39.5 | 
| 
 9 
10.4 
 | 
7 | 40 | 
| 
 9.5 
10.6 
 | 
7.5 | 40.5 | 
| 
 10 
10.8 
 | 
8 | 41 | 
| 
 10.5 
11 
 | 
8.5 | 41.5 | 
| 
 11 
11.2 
 | 
9 | 42 | 
| 
 11.5 
11.4 
 | 
9.5 | 42.5 | 
| 
 12 
11.6 
 | 
10 | 43 | 
| 
 13 
12 
 | 
11 | 44 | 
| 
 14 
12.4 
 | 
12 | 45 | 
| 
 3 
5 
8.4 
 | 
2 | 34 | 
| 
 3.5 
5.5 
8.6 
 | 
2.5 | 34.5 | 
| 
 4 
6 
8.8 
 | 
3 | 35 | 
| 
 4.5 
6.5 
9 
 | 
3.5 | 36 | 
| 
 5 
7 
9.2 
 | 
4 | 36.5 | 
| 
 5.5 
7.5 
9.4 
 | 
4.5 | 37.5 | 
| 
 6 
8 
9.6 
 | 
5 | 38 | 
| 
 6.5 
8.5 
9.8 
 | 
5.5 | 38.5 | 
| 
 7 
9 
10 
 | 
6 | 39.5 | 
| 
 7.5 
9.5 
10.2 
 | 
6.5 | 40 | 
| 
 8 
10 
10.4 
 | 
7 | 40.5 | 
| 
 8.5 
10.5 
10.6 
 | 
7.5 | 41.5 | 
| 
 9 
11 
10.8 
 | 
8 | 42 | 
| 
 9.5 
11.5 
11 
 | 
8.5 | 42.5 | 
| 
 10 
12 
11.2 
 | 
9 | 43 | 
| 
 10.5 
12.5 
11.4 
 | 
9.5 | 44 | 
| 
 11 
13 
11.6 
 | 
10 | 44.5 | 
| 
 11.5 
13.5 
11.8 
 | 
10.5 | 45 | 
| 
 12 
14 
12 
 | 
11 | 45.5 | 
| 
 12.5 
14.5 
12.2 
 | 
11.5 | 46.5 | 
| 
 13 
15 
12.4 
 | 
12 | 47 | 
| 
 13.5 
15.5 
12.6 
 | 
12.5 | 47.5 | 
| 
 14 
16 
12.8 
 | 
13 | 48.5 | 
| 
 14.5 
16.5 
13 
 | 
13.5 | 49 | 
| 
 15 
17 
13.2 
 | 
14 | 49.5 | 
| 
 16 
18 
13.4 
 | 
15 | 50.5 | 
| 
 17 
19 
13.6 
 | 
16 | 51 | 
| 
 18 
20 
13.8 
 | 
17 | 52 | 
| 
 0/1 
3.54 
 | 
0.5 | 16 | 
| 
 02/03 
4.33 
 | 
2 | 18 | 
| 
 04/05 
4.92 
 | 
4 | 20.5 | 
| 
 4 
4.53 
 | 
3 | 19 | 
| 
 5 
4.72 
 | 
4 | 20 | 
| 
 6 
5.12 
 | 
5 | 21 | 
| 
 7 
5.51 
 | 
6 | 22/23 | 
| 
 8 
5.91 
 | 
7 | 24/25 | 
| 
 8.5 
6.10 
 | 
7.5 | 25.5 | 
| 
 9 
6.30 
 | 
8 | 26 | 
| 
 9.5 
6.50 
 | 
8.5 | 26.5 | 
| 
 10 
6.69 
 | 
9 | 27 | 
| 
 10.5 
6.89 
 | 
9.5 | 27.5 | 
| 
 11 
7.09 
 | 
10 | 28 | 
| 
 11.5 
7.28 
 | 
10.5 | 28.5 | 
| 
 12 
7.48 
 | 
11 | 29/30 | 
| 
 12.5 
7.56 
 | 
11.5 | 30.5 | 
| 
 13 
7.68 
 | 
12 | 31 | 
| 
 13.5 
7.76 
 | 
12.5 | 31.5 | 
| 
 1 
7.87 
 | 
13 | 32 | 
| 
 1.5 
8.07 
 | 
13.5 | 32.5 | 
| 
 2 
8.27 
 | 
1 | 33/34 | 
| 
 2.5 
8.46 
 | 
1.5 | 34.5 | 
| 
 3 
8.66 
 | 
2 | 35 | 
| 
 3.5 
8.74 
 | 
2.5 | 35.5 | 
| 
 4 
9.06 
 | 
3 | 36 | 
| 
 4.5 
9.13 
 | 
3.5 | 36.5 | 
| 
 5 
9.25 
 | 
4 | 37 | 
| 
 5.5 
9.45 
 | 
4.5 | 37.5 | 
| 
 6 
9.65 
 | 
5 | 38/39 | 
| 
 6.5 
9.84 
 | 
5.5 | 39.5 | 
| 
 7 
10.04 
 | 
6 | 40 |