Workout

Warm up (800)
Drill, Kick, Swim 
...reverse IM order
(Free, Breast Back, Fly)
 …100 drill, 50 kick, 50 swim

Set (400)
Swim 8 x 50's on 1:00 
...descend 1-4
...to 90% effort 

Set (600)
3 x 50 on 1:00 EZ
1 x 150 Hard
2 x 50 on 1:30 EZ
1 x 100 Hard
1 x 50 on 2:00 EZ
50 Fast

Cool down (200)
200 choice 
...Moderate to EZ