Workout

Warm-up (600)
2 rounds
200 free/100 kick

Set (600)
3 rounds  
2 x 50 build on :55
100 free on 1:40
...descend 1-3 by rds

Set (2100)
300 on 5:00
…last 50 fly
4 x 150 on 2:30
...d1-2,3-4
300 on 5:00
…last 50 back
4 x 100 on 1:40
...d 1-4
300 on 5:00
…last 50 breast
4 x 50  FASTon 1:15
..25 kick/25 swim

Cool-down (200)
200 easy