Rebuild

Rebuilding your muscles after they have been damaged during training and races is essential for endurance athletes. Our range of proteins is designed to suit every goal, budget and taste, including Whey Protein, our premium Whey Protein Isolate, great tasting Overnight Protein, delicious Protein Bars and the biggest innovation in protein for years – WHEY20.
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  1. SiS PROTEIN20 - 12 Pack
    +3Flavours
  2. SiS PROTEIN20 - 55g
    +3Flavours
  3. SiS Whey Protein Tub - 1kg
    +4Flavours
    SiS Whey Protein Tub - 1kg
    Save 20%
    Special Price £24.00 Was £30.00
    65 Reviews
  4. SiS Advanced Isolate+ Protein Powder - 1kg
    +2Flavours
    SiS Advanced Isolate+ Protein Powder - 1kg
    Save 20%
    Special Price £36.00 Was £45.00
    22 Reviews
  5. SiS Protein Bar - 55g
    +2Flavours
  6. PNG
    SiS Protein Bar Bundle
    Save 30%
    Was £12.00 £8.40
    2 Reviews
  7. SiS PROTEIN20 Bar Bundle
    SiS PROTEIN20 Bar Bundle
    Save 20%
    Was £15.00 £12.00
    0 Reviews
  8. SiS PLANT20 Bar - 64g
    +3Flavours
  9. SiS PLANT20 Bar - 12 Pack
    +3Flavours
  10. SiS PLANT20 Bundle
    SiS PLANT20 Bundle
    Save 30%
    Was £45.00 £31.50
    0 Reviews
  11.  SiS Protein Bar - 20 Pack
    +2Flavours
    SiS Protein Bar - 20 Pack
    Save 20%
    Special Price £32.00 Was £40.00
    53 Reviews
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