When you are in it for the distance, you need something purpose designed for all out comfort without sacrificing performance. Castelli's Tri Donna ITU Suit is that something. Made with as few seams as possible, and the ones that are there are certainly nowhere near areas of potential chafing, it will be comfortable for the duration.
Comfort is continued with Castelli's KISS Tri pad, which is based on their highly regarded cycle version, but with material cut away where it would impede a run or swim. On the bike in the aero position is where it excels though, with constantly variable thickness padding in just the right places.
Of course, comfort is nothing if you are being slowed down, so the suit is close fitting and streamlined. The fabric is Castelli's Instadry, with a Hydrophobic treatment. This combination makes for a slippery surface when in the water and fast drying when you get out, so you don't get weighed down or cold. The back is Velocity mesh, which is breathable and proven to be very aerodynamic on the bike.
Giro 3 grippers hold the suit in place and close to your body, with pockets for gels or even arm warmers that don't hinder the aerodynamics are on the rear.
This suit is ITU competition compliant.
Temperature range: 17 - 35 deg
Note: Please click on the above tabs for the Castelli size guide and technology guide.
Note: Castelli clothing is sized small, Tweeks Cycles recommend you select one size above normal for an athletic fit, or two sizes above if you prefer a more relaxed fit.
NB: Image for illustration purposes only
Hydrophobic Treated Instadry Fabric
Velocity Mesh Back
KISS TRI Pad
GIRO3 Gripper Elastic
Despite being In existance as a clothing manufacturer since 1876, it wasn't until in the late 1940's that Castelli shot to fame with Fausto Coppi, Il Campionissimo (the champion of champions): One of the all time great post war cyclists, a five time winner of the Giro and twice holder of the yellow jersey in the Tour de France.
Armando Castelli was his tailor, and together they created the first silk cycling jersey, a lighter material designed to help when climbing in the alps. The following years saw Castelli create cycling clothing for nearly all the top riders to give them the same edge he had given Coppi; developing the skin suit, chamois, back pockets and zippered collars along the way.
Castelli Sport was founded in 1974 under the iconic scorpion logo to provide premium racing clothing to the next generation of riders, utilising space age (at the time) Lycra for the first time. Something that brought Merckx, Hinault and Moser through the door and gave rise to a new range of innovations derived from the demands of these legendary riders.
Today Castelli continue to build upon their heritage, supporting the champions of cycling by constantly reworking existing designs and materials to produce some of the finest clothing available.
(A) Chest (cm)
(B) Waist (cm)
(C) Hips (cm)
(D) Inseam (cm)
39 - 40
41 - 42
43 - 44
45 - 46
S / M
L / XL
35 - 38
39 - 41
(E) Palm Circumference (mm)
166 - 184
184 - 202
202 - 220
1. On the bike your Castelli jersey should fit close to the skin.
2. Off the bike, your Castelli jersey might feel tight across the chest and a little short in front.
3. Castelli ProSecco treatment helps perspiration evaporate quickly to keep you cooler and drier.
4. Castelli jerseysare designed with the sleeves articulated forward for maximum aerodynamic performance.
5. Bibshorts should fit tightly enough to support critical leg muscles through compression without inhibiting movement and constricting blood flow.
Body Paint Engineered Lycra
Body Paint Engineered knit fabric integrates most components into a single piece of seamless fabric. Variable knit structure improves aerodynamics and moisture management.
The Rosso Corsa label is only applied to the highest-level products Castelli make. Every thread and fiber, every curve and contour are obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli's performance-enhancing apparel.
Vortex dimpled fabric on legs for aero performance and muscle support without constricting.
Exclusively engineered by Castelli. We take our thermal fleecy stretch Thermoflex fabric and coat it with millions of tiny nanofilaments to create the most water-repellent fabric finish ever. Drops of water stay as spherical balls on top of the fabric or bounce off the fabric without leaving a trace.
Our standard shorts fabric will have you screaming comfort. 210 grams of outstanding stretch and rebound with a smooth semi-matte finish.
Endurance Evolution fabric provides optimum muscle support and feels dryer in nearly all conditions.
Single-layer engineered elastic gripper. Designed for a soft touch while keeping the garment held in place. Look for it on bibshort leg cuffs and the arm openings of the Free Tri collection.
Lightweight polyester fabric dries almost instatly. Controlled stretch allows for luxurious comfort and unmatched aerodynamic fit.
100% polyester multidenier fabric. The 3D weave reduces contact area with your skin to provide excellent wicking. It dries in the blink of an eye and in fact is the ideal fabric for hot-weather racing.
Lightweight fabric incorporates energy-activated technology to cool better than with sweat evaporation alone. The dynamic print pattern fadesat higher temperatures to show you where it's working. 50+ UPF.
eVent waterproof fabric keeps you dry in wet conditions. It's waterproof outside while allowing perspiration to escape from the inside through millions of tiny pores. In fact, eVent is 30% more breathable than its closest competitor. eVent is the smartest choice for athletes who need and demand the highest possible performance and comfort from their apparel.
ProSecco Strada is a major step forward in classic jersey fabric. Its controlled stretch allows designers to engineer a perfect fit. ProSecco hydropholic treatment helps keep you dryer and more comfortable than ever before.
Soft and stretchy with a cotton hand and look, Softlex provides outstanding moisture management and comfort. Excellent for cycling inside and outside.
A tropical hydrophilic treatment which causes water to spread out over a larger surface area allowing for quicker evaporation.
Waremer is more than a name, it's exactly what the fabric delivers during workouts. Its fleecy inside keeps you warm, while 100% polyester fibers quickly wick sweat away. It's the fabric of choice when thermal insulation is qually important as moisture management.
Thermoflex gives you a stretchy layer of cold-weather protection.Its fleecy inside traps a layer of warm ait next to your skin, while its high stretch gives you an aerodynamic fit.
The highly stretchable indstopper X-Lite fabric moves naturally with your body and doesn't restrict movement. It also delivers unprecedented performance, with 100% wind protection, and up to ten times greater breathability compared to other windproof fabrics.
A dual layer 100% polyester fabric which uses a multifilament inner layer to transport moisture to the microfiber outer layer for maximum evaporation.
ProSecco hydrophylic treatment speeds up evaporation by spreading moisture over a larger surface are within the fabric. The 3-D structure of the fabric holds the surface off the skin, improving wicking and reducing cling, keeping you dry and comfortable.
Using the technology of SG0.6, SG0.6 Wind sandwiches a wind membrane between two layers of SG0.6 fabric. Trapped air is the fibers provide excellent insulation in cold while allowing airflow to evaporate sweat. It's the lightest windproof baselayer developed for the professional in all of us.