Workout

Warm up (800)
4 x 100 Swim ...rest 10 sec.
2 x 50 Kick ...rest 5 sec.

Set (300)
6 x 50 Drill w/:15 rest 

Set(1000)
4 x 250 on 3:30
...100 free, 50 stroke drill, 50 free
50 stroke
...IM order

Main set (800) 
2 rounds 
25 on :30, 50 on :40, 75 on :55, 100 on 1:25, 75 on :55, 
50 on :40, 25 on :30

Cool-down (100)
EZ 100