Workout

Warm-up (600)
300 swim/200 kick/100 drill

Set (900)
6 x 150 on 2:30
...50 kick/100 swim
 
Set (1800)
4 rounds
2 x 100 1:30, 1:25, 1:20, 1:15
2 x 75 on 1:05 
…Free/Stroke/Free
1 x 50 on :50 
…odd rounds: FAST 
…even: EASY
2 x 25 on :30 
…odd rounds: EASY 
…even: FAST

Cool-down (200)
200 EZ choice