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SIS

SIS Go Isotonic Energy Gel Variety Pack 7 X 60ML

Regular price $24.00 Full price
Sale price $24.00
Club price
Regular price $28.00 Full price

SIS

SIS Gel Beta Fuel 60ml Orange

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.49 Full price

SIS

SIS Gel Beta Fuel 60ml Strawberry & Lime

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.49 Full price

SIS

SIS GO Lemon Hydration Tablet

Regular price $17.00 Full price
Sale price $17.00
Club price
Regular price $18.00 Full price

SIS

SIS GO Hydro Tablets 20 X 4.3g Berry

Regular price $17.00 Full price
Sale price $17.00
Club price
Regular price $18.00 Full price

SIS

SIS GEL BETA FUEL+ NOOTROPICS 60ML APPLE

Regular price $5.40 Full price
Sale price $5.40
Club price
Regular price $5.99 Full price

SIS

SIS GO PLUS Fruit Salad Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO PLUS Lemon & Lime Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO PLUS Tropical Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO PLUS Apple Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO Strawberry & Lime Hydration Tablet

Regular price $17.00 Full price
Sale price $17.00
Club price
Regular price $18.00 Full price

SIS

SIS GO Strawberry Baked Energy Bar 50g

Regular price $4.80 Full price
Sale price $4.80
Club price
Regular price $5.01 Full price

SIS

SIS GO PLUS Blackcurrant Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO Lemon Baked Energy Bar 50g

Regular price $4.80 Full price
Sale price $4.80
Club price
Regular price $5.01 Full price

SIS

SIS Go Energy Plus Caffeine Energy Gel 60ML Berry

Regular price $4.50 Full price
Sale price $4.50
Club price
Regular price $4.99 Full price

SIS

SIS GO PLUS Pineapple Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO Pineapple & Mango Hydration Tablet

Regular price $17.00 Full price
Sale price $17.00
Club price
Regular price $18.00 Full price

SIS

SIS GO PLUS Orange Isotonic Energy Gel 60mL

Regular price $3.60 Full price
Sale price $3.60
Club price
Regular price $4.00 Full price

SIS

SIS GO Grapefruit Hydration Tablet

Regular price $17.00 Full price
Sale price $17.00
Club price
Regular price $18.00 Full price

SIS

SIS GO Chocolate Fudge Mini Energy Bar 40g

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.50 Full price

SIS

SIS GO Hydro Tablets 20 X 4g Cola + Caffeine

Regular price $17.00 Full price
Sale price $17.00
Club price
Regular price $18.00 Full price
SIS Beta Fuel Plus Nootropics Gel Apple 6x 60ml Sachet
28% Off Full Price

SIS

SIS Beta Fuel Plus Nootropics Gel Apple 60ml

Regular price $5.00 Full price
Sale price $5.00
Club price
Regular price $7.00 Full price

SIS

SIS Beta Fuel Energy Chew Orange

Regular price $7.50 Full price
Sale price $7.50
Club price
Regular price $8.00 Full price

SIS

SIS Beta Fuel 80 Energy Drink Sachet Strawberry & Lime

Regular price $7.50 Full price
Sale price $7.50
Club price
Regular price $8.00 Full price

SIS

SIS Beta Fuel 80 Energy Drink Sachet Orange

Regular price $7.50 Full price
Sale price $7.50
Club price
Regular price $8.00 Full price

SIS

SIS Beta Fuel Energy Chews Lemon

Regular price $7.50 Full price
Sale price $7.50
Club price
Regular price $8.00 Full price

SIS

SIS Beta Fuel 80 Energy Drink Sachet Red Berry

Regular price $7.50 Full price
Sale price $7.50
Club price
Regular price $8.00 Full price

SIS

SIS GO PLUS Double Espresso Caffeinated Isotonic Energy Gel 60mL

Regular price $4.50 Full price
Sale price $4.50
Club price
Regular price $4.99 Full price

SIS

SIS GO Energy Bake Bar Tiramisu 50g

Regular price $4.80 Full price
Sale price $4.80
Club price
Regular price $5.01 Full price

SIS

SiS GO Energy Mini Bar Blueberry (Single 40g)

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.50 Full price

SIS

SIS GO Blackcurrant & Apple Mini Energy Bar 40g

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.50 Full price

SIS

SIS Go Electrolyte Sports Fuel 500g Blackcurrant

Regular price $35.00 Full price
Sale price $35.00
Club price
Regular price $35.95 Full price

SIS

SIS Go Electrolyte Sports Fuel Powder 500g Orange

Regular price $35.00 Full price
Sale price $35.00
Club price
Regular price $35.95 Full price

SIS

SIS GO Berry Hydration Tablet

Regular price $13.00 Full price
Sale price $13.00
Club price
Regular price $13.95 Full price

SIS

SIS GO Red Berry Caffeinated Energy Bar 40g

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.50 Full price
SIS Beta Fuel Dual Source Energy Gel 60ml Neutral
New

SIS

SIS Beta Fuel Dual Source Energy Gel 60ml Neutral

Regular price $4.90 Full price
Sale price $4.90
Club price
Regular price $5.49 Full price

Find Your Size

Step 1: Measure your height

  • Take off your shoes
  • Stand with your back straight against a wall
  • Balance a book on your head to mark your height on the wall
  • Measure your height by the distance from the floor to the mark
cm

Find Your Size

Step 2: Adjust your inseam

  • Based on your height, we’ve calculated a starting point.
  • You can measure your inseam by tucking a book between your legs so there is pressure but it isn’t uncomfortable.
  • Inseam typically falls with 5cm of the average.
cm

Find Your Size

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Science in Sport (SIS) Gels and Nutrition

Science in Sport plc is a leading sports nutrition company that develops, manufactures and markets sports nutrition products for professional athletes and sports enthusiasts. SiS is a strong brand in the elite athlete community - in the 2012 London Olympics, 24 medal-winning athletes or teams used SiS products.

SiS has three core product ranges: SiS GO, comprising of energy powders, isotonic gels, energy bars and hydration tablets; and SiS REGO, a range of full spectrum recovery products; and PROTEIN which includes the biggest innovation in protein for years - WHEY20. SiS products are sold in a range of retail channels, including specialist sport retailers, major grocers, high street retailers and e-commerce websites.

SiS is currently the official sports nutrition supplier to Team Sky, Team Wiggins, Katarina Johnson-Thompson, GB Rowing and Spartan Race. SiS are also currently the official supplier of sports drinks and sports nutrition to the GB Rowing Team. In addition, Britain's greatest ever Olympian Sir Chris Hoy is an official brand ambassador.

SiS was founded in 1992 and is headquartered in London, EC1N. Its manufacturing facility is in Nelson, Lancashire.

Science in Sport plc was admitted to trading on the AIM market of the London Stock Exchange on 9 August 2013, under the ticker symbol SIS.

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