Workout

Warmup (600)  
300 swim/200 drill
100 kick

Set (600)
2 rounds
4 x 150's on 2:15
…free / stroke / free
…IM order

Set (1500) 
6 rounds
25 on 1:00
50 on 1:00
75 on 1:00
100 on 1:00

Cool-down (300)
200 drill
100 EZ