Workout

Warmup (600)  
300 swim/200 drill
100 kick

Set (600) 
Pull 6 x 100 on 1:30
…descend 1-3,4-6

Set (1200)
2 rounds
4 x 150's on 2:15
…free / stroke / free
…IM order

Set (800) 
4 rounds
4 x 50
…odds free on :50
…evens stroke on 1:00

Cool-down (200)
200 drill